<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>032-一个feBlend滤镜</title>
</head>

<body>
    <svg xmlns="http://www.w3.org/2000/svg" version="1.1">
        <defs>
            <linearGradient id="MyGradient" gradientUnits="userSpaceOnUse" x1="100" y1="0" x2="300" y2="0">
                <stop offset="0" style="stop-color:#000000" />
                <stop offset=".33" style="stop-color:#ffffff" />
                <stop offset=".67" style="stop-color:#ffff00" />
                <stop offset="1" style="stop-color:#808080" />
            </linearGradient>
            <filter id="normal">
                <feBlend mode="normal" in2="BackgroundImage" in="SourceGraphic" />
            </filter>
            <filter id="multiply">
                <feBlend mode="multiply" in2="BackgroundImage" in="SourceGraphic" />
            </filter>
            <filter id="screen">
                <feBlend mode="screen" in2="BackgroundImage" in="SourceGraphic" />
            </filter>
            <filter id="darken">
                <feBlend mode="darken" in2="BackgroundImage" in="SourceGraphic" />
            </filter>
            <filter id="lighten">
                <feBlend mode="lighten" in2="BackgroundImage" in="SourceGraphic" />
            </filter>
        </defs>
        <g style="enable-background:new">
            <rect x="40" y="20" width="300" height="450" style="fill:url(#MyGradient)" />
            <g style="font-size:75;fill:#888888;fill-opacity:.6">
                <text x="50" y="90" filter="url(#normal)">Normal</text>
                <text x="50" y="180" filter="url(#multiply)">Multiply</text>
                <text x="50" y="270" filter="url(#screen)">Screen</text>
                <text x="50" y="360" filter="url(#darken)">Darken</text>
                <text x="50" y="450" filter="url(#lighten)">Lighten</text>
            </g>
        </g>
    </svg>
</body>

</html>